Question

我想访问引发超出范围异常的std::vector的引用，或者至少引发抛出异常的行号（类似于Java的堆栈跟踪）。这是一个示例程序：

#include <iostream>
#include <vector>
std::vector<int> vec1;
std::vector<int> vec2;
vec1.push_back(1);
vec2.push_back(2);
try
{

    std::cout << vec1.at(1) << std::endl;
    std::cout << vec2.at(1) << std::endl;
}
catch(Exception e)
{
    // e.lineNumber()? e.creator_object()?
    std::cout << "The following vector is out of range: " << ? << std::endl;
    // or...
    std::cout << "There was an error on the following line: " << ? << std::endl;
}

我知道这个例子很简单，但我希望它能说明我正在寻找的功能。

编辑：实施，来自g ++ --version：g ++（GCC）4.1.2 20071124（Red Hat 4.1.2-42）

Answer 1

您需要自己动手：

#include <iostream>
#include <vector>

std::vector<int> vec1;
std::vector<int> vec2;

vec1.push_back(1);
vec2.push_back(2);

try
{
    std::cout << vec1.at(1) << std::endl;
}
catch(std::exception& e)
{
    std::cout << "The following vector is out of range: " << "vec1" << std::endl;
}

try
{
    std::cout << vec2.at(1) << std::endl;
}
catch(std::exception& ex)
{
    std::cout << "The following vector is out of range: " << "vec2" << std::endl;
}

哪个向量使索引超出范围异常？

1 个答案: